Improvement in steam-boilers



NFETERS, PHOTO-LITHOGRAPHER, WASHINGTON, D Cy ALONZO HITCHCOCK,

PATENT OFFICE.

OF NEW YORK, N. Y.

A IMPROVEMENT IN STEAM-BOILEPLS.

Specification forming part of Letters Patent No. 39,047, dated June 30, 1863.

To all whom it may concern,.-

Beit known that I, ALONZO HITCHCOCK, of New York, in the county and State of New York, have invented a new and usetul Improvement in Steam-Boilers; and I do hereby declare that the following is a full, clear, and x 1ct description of the same, reference being had to the a( companying drawings, making a part of this specification, and to the letters of reference marked thereon.

The object of' my invention is to facilitate the cleaning and repairing of steam-boilers; and it is accomplished by constructing them in such a way that the fines can be separated aid withdiawn fr m the shell so that access may be easily had to any part ot' either.

My invention consists in bolting the heads to which the Ilues are attached to internal and external lian ges placed at the ends of the boiler in such a manner that on removing the bolts the flues and the smaller head may be drawn through the interior ot' the boiler.

To enable others skilled in the arts to which my invention appertains to make and use the same, I will proceed to describe its construction andoperation with reference to the drawings.

Figures l and 2 are longitudinal and transverse sections of an ordinary cylindrical boiler with return-dues, and Fig. 3 is a representation of the same with the Iiues partially withdrawn.

The shell a is furnished with iianges b and cat each end. One of the ilanges is placed on the interior and the other on the exterior of the boiler. The tlues d are riveted in the usual manner to the heads e andf, which are made to fit the anges. On removing the bolts which secure the head to the Ilanges the smaller head, e, may be drawn through the boil` erin withdrawing the tlues from the shell, as is shown in Fig. 3. The roller g, placed on the tlues nea-r the inside and smaller head, facilitates its passage through the shell.

l havedescribed and illustrated an ordinary cylindrical boiler such as are commonlyused on theWestern rivers,for the reason that although they have but a pair ot'internal dues, it is often convenient, in the absence of any better method, to cut away sound portions ofthe boiler to enable the workmen to reach parts that it is necessary to repair; but it is manifest that my invention may be applied with advantage to almost any ot' the systems ot construction that have been hitherto adopted.

I claim as my invention and desire to secure by Letters Patent- Securing the lines of stcamboilers to heads which may be removed from the shell substantiallyin the manner described, and for the purpose set forth.

ALONZO HITCHCOCK.

Witnesses I. BURNHAM, WM. KEMBLE HALL. 

